Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Mark Joseph Titi, MD

Individual provider Allergy & Immunology Physician · NPI 1649268525

Dr. Mark Joseph Titi, MD is an Allergy/Immunology in Lancaster, Pennsylvania. Graduated from University of Maryland School of Medicine in 1988, 38 years ago. Practices with Allergy and Asthma Center PC, a 2-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
38
Trained at
University of Maryland School of Medicine
Licensed in
PA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2445 Marietta Ave
Lancaster, PA 17601-1942
Phone: (717) 393-1365
Fax: (717) 393-8540
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy & Immunology Physician (primary) Taxonomy 207K00000X · Licence MD043419L (PA)

Record details

NPI number1649268525
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 13, 2005
Last updated in NPPESOctober 7, 2014

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MARYLAND SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice Allergy And Asthma Center Pc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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